Pump-valve



(Model) J.-N. BRADFORD & A. S. PARKE.

PUMP VALVE.

Patented Oct. 18, 1881.

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' UNITED STATES PATENT OFFIC JAMES N. BRADFORD AND AMOS S. PARKE, OE BAYCITY, MIOHIGA'N.

PUMP-VALVE.

SPECIFICATIONforming part of Letters Patent No. 248,282, dated October18, 1881.

Application filed February 1, 1881.

To all whom it may concern:

Be it known that we, JAMES N. BRADFORD and AMOS S. PARKE, of Bay City,in the county of Bay and State of Michigan, have invented certain newand useful Improvements in Pump-Valves and we do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification. I

Figure l is a side view of the valve, and Fig. 2 is a verticalsectional'view of our improved valve and pump chamber.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention relates to pump valves or pistons for salt and otherwells; and it consists in certain improvements in the construction ofthe same and of the pump-chamber, which will be hereinafter fullydescribed, and particularly pointed out in the claims.

In the drawings hereto annexed, A represents the valve-stem, whichconsists of a cylindrical body, provided near its lower end with aflanged annular rim, B, below which it is threaded, as shown at 0. Belowthe thread 0 the guide-stem D for the valve is formed, as shown.

7 Near its upper end the valve-stem is threaded, as shown at'E, abovewhich point provision is made, as shown at F, for the attachment of thepump-rods or of an upper hollow chamber, to be hereinafter described.

G is a leather packin g-rin g, whichis inclosed by a ring or band, H,having upon its inner side a stud, I, fitting in a vertical slot, J, inthe ring G, to which it is in this manner connected. The band 11 isprovided with a vertical interlocking joint, K, which, while permittingit to expand, prevents leakage between the piston and the pump-chamber.

The upper threaded portion,E, of the valvestem is made bulging, asshown, and is formed with a shoulder, L, between which and the rim B,near the lower end of the valve-stem, the band G is accommodated, thering or band H being fitted between the flange M of rim B and a collar,N, screwed upon the threaded portion E of the valve-stem.

(Model) The lower part of the piston consists of the valve-chamber O anda cup, 1?, which latter is" of less diameter than the piston, so that aspace, Q, shall be left between the walls of the pump-chamber and thesaid cup, which isclosed at the lower end. Between the cup P and chamber0 area series of perforations, B, through which the fluid is admittedinto the valve-chamber, which lat-' ter is provided with a rim orflange, S, overlapping and protecting the said openings.

The valve-chamber is provided with an iii-- terior thread, T, by whichit is connected to the lower threaded end, 0, of the valve-stem,

and it has an interior annular flange, U, which is ground to form a seatfor the valve V.

The lower flanged and threaded portion, 0,

of the valve-stem is provided with orifices or channels W for theadmission of fluid from the valve-chamber into the space X, betweenthe-valve-stem and the packing-rings G H.

The upper bulging and threaded portion, E, of

the valve-stem is provided with vertical grooves Y, between which andthe collar N the fluid may pass up through the valve.

To the upper threaded end, E, of the valvestemabove the'collar N isattached a hollow or cup-shaped top, Z, made in a single piece or in twoor more sections, and provided at its upper end with a threaded nib,A,'for attachment of the pump-rods. Said top is also provided withsuitable openings for the passage of fluid. i

B represents the pump-chamber, which is made of cast-steel in a suitablenumber of sections, 0, connected by screw-joints D. It has been foundpractically impossible to cast a pump-chamber of sufficient lengthperfectly straight and true, and considerable difficulty has beenexperienced from this source. By forming the pump-chamber in Sections,as herein shown, this difficulty may be largely or entirely overcome.

The operation of our improved pump-valve will be readily understood bythose skilled in the art to'which it appertains, and its advantages overthose ordinarily employed are numerous. This kind of pistons or valvesare generally employed in wells of great depthfrequently from twelvehundred to fifteen hundred feet--and owing to the immense pressure offluid, leakage between the piston and pumpchamber is an annoyanceexperienced as frequently as it has been found difficult to remedy in athorough and satisfactory manner, and by which a greatloss of time andpower has been caused.

Packing rings or hands adjusted upon a perforated valve-body and capableof being expanded in the pump-chamber by fluid pressure have been usedwith some degree of success. Now, it will be observed that the entirebody of our improved valve is formed by the expansible ring G and itsprotecting expansible band H, which receive directly the entire pressureof the fluid column, by which the said expansible valve-body is fittedin the pumpchamber in such a manner as to render leakage practicallyimpossible.

The construction is simplified, only few parts being employed in themake-up of the piston, and the result has been demonstrated to be highlysatisfactory.

Another important feature of our improved piston is the closedcontracted cup which forms its lower end, and above which the fluid isadmitted into the valve-chamber. 0n the downstroke of the piston thefluid rushes with great force between said contracted cup and the wallsof the pump-chamber, which are thereby cleaned of any grit andimpurities which might impede the progress of the valve and destroy theperfect fit between the piston and the pumpchamber.

We would finally invite attention to the hollow top of the valve, towhich the operatingrods are attached, and which forms a protectingcovering. In the event of accidentor breakage the said hollow top may bedetached, the operating-rods attached to the valve-stem, and theoperation of the pump proceed without further interruption.

Having thus described our invention, we claim and desire to secure byLetters Patent of the United States 1. In a pump-piston for deep wells,the body consisting of a leather ring subject to .direct fluid pressure,in combination with an expansible band or covering having verticalinterlocking joints to prevent leakage, as set forth.

2. The combination of the valve-stem A, havin g at its lower end theannular screw-threaded and flanged rim B, and anupperbulgingscrewthreaded portion, E, with the flexible ring or band G,the surrounding expansible ring or band H, and the collar N, the saidflanged rim and the said bulging portion of the valve-stem beingprovided with channels for the passage of the fluid, substantially asdescribed.

3. In a pump-piston for deep wells, the expansible body consisting of aleather ring or band having a vertical slot, in combination with anexpansible ring provided upon its inner side with a stud engaging saidslot, as set forth.

4. The pump-piston provided with the valvestcm, valve, valve-chamber O,and a cup, I, of less diameter than the piston, said cup being closed atits bottom, and being provided with perforations between its closedbottom and the valve-chamber, substantially as described.

5. The combination, with a pump-piston capable of being operated by thedirect attachment of the pump-rods t0 the valve-stem, of a detachablehollow top or protecting-cap having means for the attachment of thepump-rods, substantially as set forth.

6. The herein-described pump-piston for deep wells, consisting of avalve-stem provided with a flanged rim and a bulging threaded portion,an expansible body secured upon said valve-stein by a threaded collar, avalve-chamber provided with a closed contracted lower section, and adetachable hollow top or protecting cap, all combined and operatingsubstantially as and for the purpose shown and specified.

In testimony that we claim the foregoing as our own we have heretoafiixed our signatures in presence of two witnesses.

JAMES N. BRADFORD. AMos s. PARKE.

Witnesses:

E. V. BRELSFORD, W. H. PARKE.

